Multiphoton Ionization Spectroscopy of Surface Molecules
The method of resonant multiphoton ionization (MPI) of molecules, which has been extensively developed in the last few years, is now widely used for the purposes of spectroscopy and detection of free molecules in the gas phase [1,2].On the other hand, investigations into the laser-induced surface processes (production of free ions in particular) are constantly gaining in importance to the spectroscopy and analysis of surface. As applied to surface studies, most experiments involving the use of laser radiation were conducted in conditions of intense surface heating, wherein free ions were formed as a result of thermal and chemical ionization . In this respect, laser resonant molecular photoionization is an alternative approach which, thanks to its high efficiency, could have considerable promise for the spectroscopy of surface. This is borne out by the high rise of ion and electron signal intensities observed in MPI experiments whenever the laser radiation happened to get onto a surface containing the molecules under study [4–7].
KeywordsSurface Molecule Strong Electric Field Laser Pulse Duration Multiphoton Ionization Field Desorption
Unable to display preview. Download preview PDF.
- 3.F. Hillenkamp: In “Ion Formation from Organic Solids”, ed. by A. Benninghoven. Springer Series in Chemical Physics, Vol. 25 (Springer, Berlin, Heidelberg, New York, 1983) p. 190.Google Scholar
- 4.V.S. Antonov, V.S. Letokhov, A.N. Shibanov: Pis’ma Zh. Exp. Teor. Fiz. (Russian) 31, 471 (1980)Google Scholar
- 8.S.E. Egorov, A.N. Shibanov: Kvantovaya Elektronika (Russian) 11, 1397 (1984)Google Scholar
- 10.V.S. Antonov, E.V. Moskovetz: Poverkhnost: Fiz. Chim. Mech. (Russian) to be publishedGoogle Scholar
- 11.V.S. Antonov, S.E. Egorov, V.S. Letokhov, Yu.A. Matveetz, A.N. Shibanov: Pis’ma Zh. Exp. Teor. Fiz. (Russian) 36, 29 (1982)Google Scholar
- 12.V.S. Antonov, S.E. Egorov, V.S. Letokhov, A.N. Shibanov: Pis’ma Zh. Exp. Teor. Fiz. (Russian) 38, 185 (1983)Google Scholar
- 13.V.S. Antonov, V.S. Letokhov, A.N. Shibanov: Laser Chem. to be publishedGoogle Scholar
- 15.H.D. Beckley: “Principles of field ionization and field desorption mass spectrometry”, Intern. Series in Ananlytical Chem., vol. 61 (1977) p. 61Google Scholar